<template>
  <div class="login-container">
    <!-- 顶部 -->
    <div class="absolute-tl flex-x-end p-3 w-full">
      <el-switch
        v-model="isDark"
        inline-prompt
        :active-icon="Moon"
        :inactive-icon="Sunny"
        active-color="var(--el-fill-color-dark)"
        inactive-color="var(--el-color-primary)"
        @change="handleThemeChange"
      />
      <lang-select class="ml-2 cursor-pointer" />
    </div>
    <!-- 登录表单 -->
    <el-card class="!border-none !bg-transparent !rounded-4% w-100 <sm:w-85">
      <div class="text-center relative">
        <h2>{{ defaultSettings.title }}</h2>
        <el-tag class="ml-2 absolute-tr">{{ defaultSettings.version }}</el-tag>
      </div>

      <el-form ref="loginFormRef" :model="loginData" :rules="loginRules" class="login-form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <div class="flex-y-center w-full">
            <svg-icon icon-class="user" class="mx-2" />
            <el-input ref="username" v-model="loginData.username" :placeholder="$t('login.username')" name="username" size="large" class="h-[48px]" />
          </div>
        </el-form-item>

        <!-- 密码 -->
        <el-tooltip :disabled="isCapslock === false" content="Caps lock is On" placement="right">
          <el-form-item prop="password">
            <div class="flex-y-center w-full">
              <el-icon class="mx-2"><Lock /></el-icon>
              <el-input
                v-model="loginData.password"
                :placeholder="$t('login.password')"
                :type="passwordVisible === false ? 'password' : 'input'"
                name="password"
                @keyup="checkCapslock"
                @keyup.enter="handleLogin"
                size="large"
                class="flex-1 h-[48px]"
              />
              <span class="mr-2 cursor-pointer" @click="passwordVisible = !passwordVisible">
                <el-icon v-if="passwordVisible === false"><View /></el-icon>
                <el-icon v-else><Hide /></el-icon>
              </span>
            </div>
          </el-form-item>
        </el-tooltip>

        <!-- 验证码 -->
        <el-form-item prop="captchaCode" v-if="captchaData.enabled">
          <div class="flex-y-center w-full">
            <svg-icon icon-class="captcha" class="mx-2" />
            <el-input v-model="loginData.captchaCode" auto-complete="off" size="large" class="flex-1" :placeholder="$t('login.captchaCode')" @keyup.enter="handleLogin" />

            <el-image @click="getCaptcha" :src="captchaData.image" class="rounded-tr-md rounded-br-md cursor-pointer h-[48px]" />
          </div>
        </el-form-item>

        <!-- 登录按钮 -->
        <el-button :loading="loading" type="primary" size="large" class="w-full" @click.prevent="handleLogin">{{ $t('login.login') }} </el-button>

        <!-- 账号密码提示 -->
        <div class="mt-10 text-sm">
          <span>{{ $t('login.username') }}: admin</span>
          <span class="ml-4"> {{ $t('login.password') }}: 123456</span>
          <span class="ml-4"> {{ captchaData.enabled ? 'yes' : 'no' }}:</span>
        </div>
      </el-form>
    </el-card>

    <!-- ICP备案 -->
    <div class="absolute bottom-1 text-[10px] text-center" v-show="icpVisible">
      <p> Copyright © 2021 - 2024 youlai.tech All Rights Reserved. 有来技术 版权所有 </p>
      <p>皖ICP备20006496号-3</p>
    </div>
  </div>
</template>

<script setup lang="ts">
  import { useSettingsStore, useUserStore, useAppStore } from '@/store';
  import { Sunny, Moon } from '@element-plus/icons-vue';
  import router from '@/router';
  import { LocationQuery, LocationQueryValue, useRoute } from 'vue-router';
  import { getCaptchaApi } from '@/api/auth';
  import { LoginData, CaptchaResult } from '@/api/auth/types';

  const route = useRoute();
  const userStore = useUserStore();
  const settingsStore = useSettingsStore();

  import defaultSettings from '@/settings';
  /**
   * 明亮/暗黑主题切换
   */
  const isDark = ref<boolean>(settingsStore.theme === 'dark');
  const handleThemeChange = (isDark: any) => {
    useToggle(isDark);
    settingsStore.changeSetting({
      key: 'theme',
      value: isDark ? 'dark' : 'light',
    });
  };

  /**
   * 根据屏幕宽度切换设备模式
   */
  const appStore = useAppStore();
  const { width, height } = useWindowSize();
  const icpVisible = ref(true);

  watchEffect(() => {
    // 响应式布局容器固定宽度  大屏（>=1200px） 中屏（>=992px） 小屏（>=768px）
    if (width.value < 992) {
      appStore.toggleDevice('mobile');
    } else {
      appStore.toggleDevice('desktop');
    }

    if (height.value < 600) {
      icpVisible.value = false;
    } else {
      icpVisible.value = true;
    }
  });

  const loading = ref(false); // 按钮loading
  const isCapslock = ref(false); // 是否大写锁定
  const passwordVisible = ref(false); // 密码是否可见
  const captchaData = ref<CaptchaResult>({
    enabled: false,
    key: '',
    image: '',
  }); // 验证码图片Base64字符串
  const loginFormRef = ref(ElForm); // 登录表单ref

  const loginData = ref<LoginData>({
    username: 'SYSTEM',
    password: '000000',
  });

  const { t } = useI18n();
  const loginRules = computed(() => {
    const prefix = appStore.language === 'en' ? 'Please enter ' : '请输入';
    return {
      username: [
        {
          required: true,
          trigger: 'blur',
          message: `${prefix}${t('login.username')}`,
        },
      ],
      password: [
        {
          required: true,
          trigger: 'blur',
          validator: (rule: any, value: any, callback: any) => {
            if (value.length < 6) {
              callback(new Error('The password can not be less than 6 digits'));
            } else {
              callback();
            }
          },
          message: `${prefix}${t('login.password')}`,
        },
      ],
      captchaCode: [
        {
          required: true,
          trigger: 'blur',
          message: `${prefix}${t('login.captchaCode')}`,
        },
      ],
    };
  });

  /**
   * 检查输入大小写状态
   */
  function checkCapslock(e: any) {
    const { key } = e;
    isCapslock.value = key && key.length === 1 && key >= 'A' && key <= 'Z';
  }

  /**
   * 获取验证码
   */
  function getCaptcha() {
    getCaptchaApi().then(({ data }) => {
      loginData.value.captchaKey = data.key;
      captchaData.value = data;
    });
  }

  /**
   * 登录
   */
  function handleLogin() {
    loginFormRef.value.validate((valid: boolean) => {
      if (valid) {
        loading.value = true;
        userStore
          .login(loginData.value)
          .then(() => {
            const query: LocationQuery = route.query;

            const redirect = (query.redirect as LocationQueryValue) ?? '/';

            const otherQueryParams = Object.keys(query).reduce((acc: any, cur: string) => {
              if (cur !== 'redirect') {
                acc[cur] = query[cur];
              }
              return acc;
            }, {});

            router.push({ path: redirect, query: otherQueryParams });
          })
          .catch(() => {
            // 验证失败，重新生成验证码
            getCaptcha();
          })
          .finally(() => {
            loading.value = false;
          });
      }
    });
  }

  onMounted(() => {
    getCaptcha();

    // 主题初始化
    const theme = useSettingsStore().theme;
    useSettingsStore().changeSetting({ key: 'theme', value: theme });
    if (theme == 'dark') {
      document.documentElement.classList.add('dark');
    } else {
      document.documentElement.classList.remove('dark');
    }
  });
</script>

<style lang="scss" scoped>
  html.dark .login-container {
    background: url('@/assets/images/login-bg-dark.jpg') no-repeat center right;
  }

  .login-container {
    overflow-y: auto;
    background: url('@/assets/images/login-bg.jpg') no-repeat center right;

    @apply wh-full flex-center;

    .login-form {
      padding: 30px 10px;
    }
  }

  .el-form-item {
    background: var(--el-input-bg-color);
    border: 1px solid var(--el-border-color);
    border-radius: 5px;
  }

  :deep(.el-input) {
    .el-input__wrapper {
      padding: 0;
      background-color: transparent;
      box-shadow: none;

      &.is-focus,
      &:hover {
        box-shadow: none !important;
      }

      input:-webkit-autofill {
        /* 通过延时渲染背景色变相去除背景颜色 */
        transition: background-color 1000s ease-in-out 0s;
      }
    }
  }
</style>
